Chapter 3 Reference Manual
Ranger E/D
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Mounting Rangers and Lightings
Figure 3.7 – Example of MultiScan set-up using one white light source, one IR laser for
scatter measurement and one IR laser for 3D measurement, and a Ranger
with the IR filter option. Note that the scatter laser is mounted so that the
light beam intersects the optical axis at the lens’ entrance pupil.
3.4 Color Measurements
The setup for color data acquisition can follow the general guidelines for Multiscan setup,
with the following additions:
Geometry It is recommended to use the ordinary geometry with the camera
mounted more or less vertically above the object, since this makes the
light source alignment easier.
Note that it is typically good to tilt the setup a little bit off the true vertical
alignment to avoid specular reflections.
Illumination The white light source for color acquisition needs to cover all color rows
on the sensor – that is, at least around 10 rows. It must also be ensured
that the illumination covers the color region for the entire height range in
the FOV.
When using the high-resolution grayscale row together with the standard
color rows, the illumination line must cover approximately 50 rows.
Alignment Since color image acquisition with ColorRanger requires that data from
different channels are registered together, it is important that the camera
is well aligned with the object’ direction of movement. If this is not the
case the color channel registration must also compensate for a sideway
shift, which is currently not supported by the iCon API.
Optical axis
IR laser
3D
Field-of-vie
Entrance pupil
of lens
IR laser
scatter
0 Row: 511
IR filtered rows
Ranger with
IR option
512
High-resolution
row
White light
source
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